Display device having routing wires extending in a bending section between a display area and a terminal section

Abstract

A display device includes: a resin substrate layer; a thin film transistor layer on the resin substrate layer, the thin film transistor layer including a sequential stack of an inorganic insulating film, a wiring layer, and a planarization film; and a light-emitting element layer, wherein a frame area is provided, a terminal section is provided, a bending section is provided between the display area and the terminal section, a plurality of routing wires are provided in the bending section and two sides of the bending section, and at least one of the plurality of routing wires includes: a display-side wiring section on an edge portion of the inorganic insulating film; a terminal-side wiring section on another edge portion of the inorganic insulating film; and an intermediate wiring section electrically connected to the display-side wiring section and the terminal-side wiring section respectively.

The invention claimed is: 
     
         1 . A display device comprising:
 a resin substrate layer;   a thin film transistor layer on the resin substrate layer, the thin film transistor layer including a sequential stack of an inorganic insulating film, a wiring layer, and a planarization film;   a light-emitting element layer on the thin film transistor layer, the light-emitting element layer including a sequential stack of a plurality of first electrodes, a plurality of light-emitting functional layers, and a common second electrode that are arranged in such a manner as to correspond to a plurality of subpixels in a display area;   a sealing film covering the light-emitting element layer and including a sequential stack of a first inorganic sealing film, an organic sealing film, and a second inorganic sealing film; and   a touch panel layer on the sealing film, the touch panel layer including a sequential stack of a first touch wiring layer, an interlayer insulating film, a second touch wiring layer, and an overcoat film, wherein:   a frame area is provided around the display area,   a terminal section is provided on an end region of the frame area,   a bending section is provided extending in one direction between the display area and the terminal section,   the inorganic insulating film has a slit, extending through the inorganic insulating film in the bending section and in a direction in which the bending section extends, to expose a surface of the resin substrate layer,   the planarization film is provided in the bending section to fill the slit,   a plurality of routing wires is provided extending, in the bending section and two sides of the bending section, parallel to each other in a direction that intersects with the direction in which the bending section extends,   at least one of the plurality of routing wires includes:
 a display-side wiring section on an edge portion of the inorganic insulating film that is on a display area side of the inorganic insulating film, the display-side wiring section being made of a same material, and provided in a same layer, as the wiring layer, 
 a terminal-side wiring section on another edge portion of the inorganic insulating film that is on a terminal section side of the inorganic insulating film, the terminal-side wiring section being made of the same material, and provided in the same layer, as the wiring layer, and 
 an intermediate wiring section electrically connected to the display-side wiring section and the terminal-side wiring section, respectively, via a first contact hole and a second contact hole, both formed through the planarization film, and 
   the intermediate wiring section includes:
 a first intermediate wiring section on the planarization film, the first intermediate wiring section being made of a same material, and provided in a same layer, as the first touch wiring layer or the second touch wiring layer, and electrically connected to the display-side wiring section via the first contact hole, 
 a second intermediate wiring section on the planarization film, the second intermediate wiring section being made of the same material, and provided in the same layer, as the first touch wiring layer or the second touch wiring layer, and electrically connected to the terminal-side wiring section via the second contact hole, and 
 a third intermediate wiring section on the resin substrate layer, the third intermediate wiring section being made of the same material, and provided in the same layer, as the wiring layer, and electrically connected to the first intermediate wiring section and the second intermediate wiring section, respectively, via a third contact hole and a fourth contact hole, both formed through the planarization film. 
   
     
     
         2 . The display device according to  claim 1 , wherein the first intermediate wiring section and the second intermediate wiring section are, respectively, covered by a first protective layer and a second protective layer, both made of a same material, and provided in a same layer, as the overcoat film. 
     
     
         3 . The display device according to  claim 2 , wherein a second protective layer side of the first protective layer and a first protective layer side of the second protective layer are covered by a reinforcing resin layer provided on the planarization film. 
     
     
         4 . The display device according to  claim 1 , wherein the resin substrate layer includes:
 a first resin substrate layer;   a second resin substrate layer on a thin film transistor layer side; and   an intra-substrate inorganic insulating film between the first resin substrate layer and the second resin substrate layer.   
     
     
         5 . The display device according to  claim 4 , wherein the slit is provided also in a surface layer of the second resin substrate layer. 
     
     
         6 . The display device according to  claim 5 , wherein a plurality of edge portions, including the edge portion and the other edge portion, of the inorganic insulating film through which the slit is formed has an eave shape, such that the plurality of edge portions projects internally to a sidewall of the surface layer of the second resin substrate layer. 
     
     
         7 . The display device according to  claim 6 , wherein the planarization film is provided, such that to fill a second resin substrate layer side of the eave on the edge portions of the inorganic insulating film. 
     
     
         8 . A display device comprising:
 a resin substrate layer;   a thin film transistor layer on the resin substrate layer, the thin film transistor layer including a sequential stack of an inorganic insulating film, a wiring layer, and a planarization film; and   a light-emitting element layer on the thin film transistor layer, the light-emitting element layer including a sequential stack of a plurality of first electrodes, a plurality of light-emitting functional layers, and a common second electrode that are arranged in such a manner as to correspond to a plurality of subpixels in a display area, wherein:   a frame area is provided around the display area,   a terminal section is provided on an end region of the frame area,   a bending section is provided extending in one direction between the display area and the terminal section,   the inorganic insulating film has a slit, extending through the inorganic insulating film in the bending section and in a direction in which the bending section extends, to expose a surface of the resin substrate layer,   the planarization film is provided in the bending section to fill the slit,   a plurality of routing wires is provided extending, in the bending section and two sides of the bending section, parallel to each other in a direction that intersects with the direction in which the bending section extends,   at least one of the plurality of routing wires includes:
 a display-side wiring section on an edge portion of the inorganic insulating film that is on a display area side of the inorganic insulating film, the display-side wiring section being made of a same material, and provided in a same layer, as the wiring layer, 
 a terminal-side wiring section on another edge portion of the inorganic insulating film that is on a terminal section side of the inorganic insulating film, the terminal-side wiring section being made of the same material, and provided in the same layer, as the wiring layer, and 
 an intermediate wiring section electrically connected to the display-side wiring section and the terminal-side wiring section, respectively, via a first contact hole and a second contact hole, both formed through the planarization film, and 
   the intermediate wiring section includes:
 a first intermediate wiring section on the planarization film, the first intermediate wiring section being made of a same material, and provided in a same layer, as the plurality of first electrodes, and electrically connected to the display-side wiring section via the first contact hole, 
 a second intermediate wiring section on the planarization film, the second intermediate wiring section being made of the same material, and provided in the same layer, as the plurality of first electrodes, and electrically connected to the terminal-side wiring section via the second contact hole, and 
 a third intermediate wiring section on the resin substrate layer, the third intermediate wiring section being made of the same material, and provided in the same layer, as the wiring layer, and electrically connected to the first intermediate wiring section and the second intermediate wiring section, respectively, via a third contact hole and a fourth contact hole, both formed through the planarization film. 
   
     
     
         9 . The display device according to  claim 8 , wherein
 the light-emitting element layer further includes an edge cover provided commonly to the plurality of subpixels between the plurality of first electrodes and the plurality of light-emitting functional layers, the edge cover covering a peripheral end portion of each of the plurality of first electrodes, and   the first intermediate wiring section and the second intermediate wiring section are, respectively, covered by a first protective layer and a second protective layer, both made of a same material, and provided in a same layer, as the edge cover.   
     
     
         10 . The display device according to  claim 9 , wherein a second protective layer side of the first protective layer and a first protective layer side of the second protective layer are covered by a reinforcing resin layer provided on the planarization film. 
     
     
         11 . The display device according to  claim 8 , wherein the resin substrate layer includes:
 a first resin substrate layer;   a second resin substrate layer on a thin film transistor layer side; and   an intra-substrate inorganic insulating film between the first resin substrate layer and the second resin substrate layer.   
     
     
         12 . The display device according to  claim 11 , wherein the slit is provided also in a surface layer of the second resin substrate layer. 
     
     
         13 . The display device according to  claim 12 , wherein a plurality of edge portions, including the edge portion and the other edge portion, of the inorganic insulating film through which the slit is formed has an eave shape, such that the plurality of edge portions projects internally to a sidewall of the surface layer of the second resin substrate layer. 
     
     
         14 . The display device according to  claim 13 , wherein the planarization film is provided, such that to fill a second resin substrate layer side of the eave on the edge portions of the inorganic insulating film. 
     
     
         15 . A display device comprising:
 a resin substrate layer;   a thin film transistor layer on the resin substrate layer, the thin film transistor layer including a sequential stack of an inorganic insulating film, a wiring layer, and a planarization film;   a light-emitting element layer on the thin film transistor layer, the light-emitting element layer including a sequential stack of a plurality of first electrodes, a plurality of light-emitting functional layers, and a common second electrode that are arranged in such a manner as to correspond to a plurality of subpixels in a display area;   a sealing film covering the light-emitting element layer and including a sequential stack of a first inorganic sealing film, an organic sealing film, and a second inorganic sealing film; and   a touch panel layer on the sealing film, the touch panel layer including a sequential stack of a first touch wiring layer, an interlayer insulating film, a second touch wiring layer, and an overcoat film, wherein:   a frame area is provided around the display area,   a terminal section is provided on an end region of the frame area,   a bending section is provided extending in one direction between the display area and the terminal section,   the inorganic insulating film has a slit, extending through the inorganic insulating film in the bending section and in a direction in which the bending section extends, to expose a surface of the resin substrate layer,   the planarization film is provided in the bending section to fill the slit,   a plurality of routing wires is provided extending, in the bending section and two sides of the bending section, parallel to each other in a direction that intersects with the direction in which the bending section extends,   at least one of the plurality of routing wires includes:
 a display-side wiring section on an edge portion of the inorganic insulating film that is on a display area side of the inorganic insulating film, the display-side wiring section being made of a same material, and provided in a same layer, as the wiring layer, 
 a terminal-side wiring section on another edge portion of the inorganic insulating film that is on a terminal section side of the inorganic insulating film, the terminal-side wiring section being made of the same material, and provided in the same layer, as the wiring layer, and 
 an intermediate wiring section electrically connected to the display-side wiring section and the terminal-side wiring section, respectively, via a first contact hole and a second contact hole, both formed through the planarization film, and 
   the intermediate wiring section is provided on the planarization film and made of a same material, and provided in a same layer, as the first touch wiring layer or the second touch wiring layer.   
     
     
         16 . The display device according to  claim 15 , wherein the intermediate wiring section is covered by a protective layer made of a same material, and provided in a same layer, as the overcoat film. 
     
     
         17 . The display device according to  claim 16 , further comprising a reinforcing resin layer on the protective layer. 
     
     
         18 . The display device according to  claim 15 , wherein the resin substrate layer includes:
 a first resin substrate layer;   a second resin substrate layer on a thin film transistor layer side; and   an intra-substrate inorganic insulating film between the first resin substrate layer and the second resin substrate layer.   
     
     
         19 . The display device according to  claim 18 , wherein the slit is provided also in a surface layer of the second resin substrate layer. 
     
     
         20 . The display device according to  claim 19 , wherein a plurality of edge portions, including the edge portion and the other edge portion, of the inorganic insulating film through which the slit is formed has an eave shape, such that the plurality of edge portions projects internally to a sidewall of the surface layer of the second resin substrate layer.